/*
 * This is Melet, a salary slip designer. Feed it with data regarding to salary payment, prepare it for print through the graphical presentation, and you have it done.
 * Copyright (C) 2014, AFDiaX
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * This program is based on UMLet, a Free UML Tool for Fast UML Diagrams.
 * To contact the authors of UMLet visit https://code.google.com/p/umlet/people/list
 * To contact the authors of Melet visit https://gna.org/users/gabocze
 */
package com.baselet.gui.listener;

import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.swing.SwingUtilities;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;

import com.baselet.control.Main;
import com.baselet.diagram.CurrentDiagram;
import com.baselet.diagram.CustomPreviewHandler;
import com.baselet.diagram.DiagramHandler;
import com.baselet.element.interfaces.GridElement;
import com.baselet.gui.CurrentGui;
import com.baselet.gui.command.ChangePanelAttributes;
import com.baselet.gui.command.CustomCodePropertyChanged;
import com.baselet.gui.command.HelpPanelChanged;

public class PropertyPanelListener implements KeyListener, DocumentListener {

	public PropertyPanelListener() {}

	@Override
	public void keyTyped(KeyEvent e) {
		if (e.getKeyChar() == '\u001b') { // ESC Key: Leaves the Property Panel
			CurrentGui.getInstance().getGui().requestFocus();
		}
	}

	@Override
	public void changedUpdate(DocumentEvent e) {
		SwingUtilities.invokeLater(new Runnable() {
			@Override
			public void run() {
				updateGridElement();
			}
		});
	}

	protected void updateGridElement() {
		GridElement gridElement = Main.getInstance().getEditedGridElement();
		String s = CurrentGui.getInstance().getGui().getPropertyPane().getText();
		DiagramHandler handler = CurrentDiagram.getInstance().getDiagramHandler();

		if (gridElement != null) {
			// only create command if changes were made
			if (!s.equals(gridElement.getPanelAttributes())) {
				int newCaretPos = CurrentGui.getInstance().getGui().getPropertyPane().getTextComponent().getCaretPosition();
				int oldCaretPos = newCaretPos - (s.length() - gridElement.getPanelAttributes().length());

				if (Main.getHandlerForElement(gridElement) instanceof CustomPreviewHandler) {
					Main.getHandlerForElement(gridElement).getController().executeCommand(new CustomCodePropertyChanged(gridElement.getPanelAttributes(), s, oldCaretPos, newCaretPos));
				}
				else {
					Main.getHandlerForElement(gridElement).getController().executeCommand(new ChangePanelAttributes(gridElement, gridElement.getPanelAttributes(), s, oldCaretPos, newCaretPos));
				}
			}
		}
		else if (handler != null && !s.equals(handler.getHelpText())) { // help panel has been edited
			handler.getController().executeCommand(new HelpPanelChanged(s));
		}

		// Scrollbars must be updated cause some entities can grow out of screen border by typing text inside (eg: autoresize custom elements)
		if (handler != null) {
			handler.getDrawPanel().updatePanelAndScrollbars();
		}
	}

	@Override
	public void keyReleased(KeyEvent e) {}

	@Override
	public void keyPressed(KeyEvent e) {}

	@Override
	public void insertUpdate(DocumentEvent e) {}

	@Override
	public void removeUpdate(DocumentEvent e) {}
}
